Otter Element

Defend. Discover. Collect them all.

An idle tower-defence game built around the periodic table. Your tower fights on its own, you train it, discover elements one by one and grow a collection that keeps earning while you are away.

13+

Older players

Android

Platform

Idle

Tower defence

The full game is made for Android and is not out yet. We will add the Google Play link here when it is ready. Otter Element is for ages 13 and up and is not part of our learning games for younger children.

The periodic table is the game

Every win discovers a real element. Find all 118 and light up the whole table. Tap a tile below to discover it.

118elements to discover

10real element families

3powers to cast in battle

3turret bays for molecules

0 / 118

Tap any tile

Discovering an element reveals its name and symbol. In the game, each element you find also adds to your power list. Hydrogen, for example, gives you Fusion bolt.

Chemistry 101, built in

The game teaches the science as you play. A short guide covers four ideas, using the same atoms you collect.

What is an atom?

A core of protons and neutrons, with electrons orbiting it.

Protons are identity

Protons decide the element. Electrons fill shells: first 2, then 8, then 8. Hydrogen has 1 proton, helium 2, oxygen 8.

The periodic table

Sorted by protons. Same column, similar behaviour. Elements in the same column act alike because their atoms have the same number of outer electrons.

Molecules

Atoms share electrons to bond. Two H and one O make water. In the Lab, you fuse atoms into molecules, then fit them to your turret.

Fuse molecules. Power up your turret.

Pick two atoms and press Fuse. Each molecule fits one of three turret bays: barrel, core or mount, and changes how your tower fights. Try it.

Pick two atoms

FightYour tower fires on its own. Train it with credits and cast powers.

DiscoverClear a node to find the next element and unlock its power.

FuseCombine atoms in the Lab into molecules. Guardians drop more recipes.

EquipFit molecules to the barrel, core and mount, and choose three powers.

GrowSpend Research Points on lasting bonuses and push the next guardian.